Changed into a CGI script

Cargo.toml

@@ -6,19 +6,15 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-log = "0.4"
-image = "0.24"
-gif = "0.12"
+image = "0.25"
+gif = "0.13"
 futures = "0.3"
-wgpu = {version="0.18", features=["webgl"]}
+tokio = {version="1.37", features=["full"]}
+wgpu = {version="22"}
 bytemuck = {version="1.14", features=["derive"]}
 futures-intrusive = "0.5"
-pollster = "0.3"
-clap = { version = "4.4.16", features = ["derive"] }
-indicatif = "0.17"
+rust-cgi = "0.7"
 
-[dev-dependencies]
-flexi_logger = "0.27"
 
 [profile.dev]
 opt-level=1

resources/web-assembly-icon.svg

@@ -0,0 +1,5 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 107.62 107.62"><defs><style>
+      .cls-1 {
+        fill: #654ff0;
+      }
+    </style></defs><title>web-assembly-icon</title><g id="Layer_2" data-name="Layer 2"><g id="Notch_-_Purple" data-name="Notch - Purple"><g id="icon"><path class="cls-1" d="M66.12,0c0,.19,0,.38,0,.58a12.34,12.34,0,1,1-24.68,0c0-.2,0-.39,0-.58H0V107.62H107.62V0ZM51.38,96.1,46.14,70.17H46L40.39,96.1H33.18L25,58h7.13L37,83.93h.09L42.94,58h6.67L54.9,84.25H55L60.55,58h7L58.46,96.1Zm39.26,0-2.43-8.48H75.4L73.53,96.1H66.36L75.59,58H86.83L98,96.1Z"/><polygon class="cls-1" points="79.87 67.39 76.76 81.37 86.44 81.37 82.87 67.39 79.87 67.39"/></g></g></g></svg>

src/draw.rs

@@ -118,7 +118,7 @@ pub struct QuickDraw {
 }
 
 impl QuickDraw {
-  pub async fn new(width: u32, height: u32, max_circles: u64) -> Self {
+  pub async fn new(width: u32, height: u32, max_circles: u64) -> Option<Self> {
     let instance = wgpu::Instance::new(wgpu::InstanceDescriptor {
       backends: wgpu::Backends::all(),
       ..Default::default()
@@ -135,7 +135,7 @@ impl QuickDraw {
       Some(a) => a,
       None => {
         eprintln!("Could not find WGPU adapter");
-        std::process::exit(1);
+        return None;
       },
     };
     let (device, queue) =
@@ -144,7 +144,7 @@ impl QuickDraw {
         Err(e) => {
           eprintln!("Could not find WGPU device:");
           eprintln!("{}", e);
-          std::process::exit(1);
+          return None;
         },
       };
 
@@ -244,14 +244,17 @@ impl QuickDraw {
         multiview: None,
         label: Some("Render Pipeline"),
         layout: Some(&render_pipeline_layout),
+        cache: None,
         vertex: wgpu::VertexState {
           module: &vert,
           entry_point: "vs_main",
           buffers: &[Vertex::desc(), Circle::desc()],
+          compilation_options: PipelineCompilationOptions::default(),
         },
         fragment: Some(wgpu::FragmentState {
           module: &frag,
           entry_point: "fs_main",
+          compilation_options: PipelineCompilationOptions::default(),
           targets: &[Some(wgpu::ColorTargetState {
             format: texture_desc.format,
             blend: Some(wgpu::BlendState::ALPHA_BLENDING),
@@ -277,7 +280,7 @@ impl QuickDraw {
         },
       });
 
-    Self {
+    Some(Self {
       device,
       queue,
       width,
@@ -292,7 +295,7 @@ impl QuickDraw {
       output_buffer,
       vertex_buffer,
       pipeline,
-    }
+    })
   }
 
   pub async fn resize(&mut self, width: u32, height: u32, max_circles: usize) {

src/main.rs

@@ -1,23 +1,15 @@
 #![feature(future_join)]
-use std::{cell::RefCell, future::join, io::Write, path::Path, sync::Arc};
+use std::{io::Cursor, sync::Arc};
+
+use tokio::sync::Mutex;
 
 use draw::QuickDraw;
 use gif::Frame;
 use image::{ImageBuffer, Rgb};
-use indicatif::{ProgressBar, ProgressStyle};
-use log::debug;
 
 pub mod draw;
 pub mod helper;
 pub mod sim;
-pub mod tests;
-
-pub fn make_progress(msg: &'static str, max: u64) -> ProgressBar {
-  let progress = ProgressBar::new(max);
-  progress.set_style(ProgressStyle::with_template("{msg} :: {bar}").unwrap());
-  progress.set_message(msg);
-  progress
-}
 
 const WIDTH: f32 = 512.0;
 const HEIGHT: f32 = 512.0;
@@ -27,21 +19,21 @@ pub async fn preprocess(
   radius: f32,
 ) -> (sim::Simulation, usize, usize) {
   let (sim, it, max_circles) =
-    sim::Simulation::simulate_image(WIDTH, HEIGHT, radius, image).await;
+    sim::Simulation::simulate_image(WIDTH, HEIGHT, radius, image);
   (sim, it, max_circles)
 }
 
 pub async fn simulate(
-  draw: &mut QuickDraw,
+  draw: Arc<Mutex<QuickDraw>>,
   mut sim: Simulation,
   it: usize,
   step: usize,
   max_circles: usize,
 ) -> Vec<Frame<'static>> {
+  let _draw = draw;
+  let mut draw = _draw.lock().await;
   draw.resize(WIDTH as u32, HEIGHT as u32, max_circles).await;
   let mut frames = vec![];
-  let progress =
-    make_progress("Simulating   ", ((it - sim.clock) / sim.substeps) as u64);
   while sim.clock < it {
     let circles = &sim
       .circles
@@ -52,14 +44,12 @@ pub async fn simulate(
         color: [c.color.0, c.color.1, c.color.2, 255],
       })
       .collect::<Vec<draw::Circle>>();
-    let bytes_future = draw.draw_circles(circles);
-    let steps = sim.steps(step);
-    let mut bytes = join!(bytes_future, steps).await.0;
-    let frame = gif::Frame::from_rgba(WIDTH as u16, HEIGHT as u16, &mut bytes);
+    sim.steps(step);
+    let mut bytes = draw.draw_circles(circles).await;
+    let frame =
+      gif::Frame::from_rgba_speed(WIDTH as u16, HEIGHT as u16, &mut bytes, 10);
     frames.push(frame);
-    progress.inc(step as u64);
   }
-  progress.finish();
   frames
 }
 
@@ -67,13 +57,10 @@ pub async fn encode(frames: Vec<Frame<'static>>, repeat: bool) -> Vec<u8> {
   let mut buffer = Vec::<u8>::new();
   let mut encoder =
     gif::Encoder::new(&mut buffer, WIDTH as u16, HEIGHT as u16, &[]).unwrap();
-  let progress = make_progress("Encoding     ", frames.len() as u64);
   for mut frame in frames {
     frame.delay = 1;
     encoder.write_frame(&frame).unwrap();
-    progress.inc(1);
   }
-  progress.finish();
   if repeat {
     encoder.set_repeat(gif::Repeat::Infinite).unwrap();
   }
@@ -81,96 +68,49 @@ pub async fn encode(frames: Vec<Frame<'static>>, repeat: bool) -> Vec<u8> {
   buffer
 }
 
-use clap::Parser;
 use sim::Simulation;
-#[derive(Parser, Debug)]
-#[command(author, version, about, long_about = None)]
-struct Args {
-  /// Input file to process. All common image types are
-  /// supported, see the `image` crate docs for specific
-  /// compatibility
-  #[arg(short = 'i', value_hint = clap::ValueHint::DirPath)]
-  input: std::path::PathBuf,
 
-  /// Output file path ('./output.gif' by default)
-  #[arg(short = 'o', value_hint = clap::ValueHint::DirPath)]
-  output: Option<std::path::PathBuf>,
-
-  /// How many physics-steps between frames. Affects the
-  /// speed and length of the animation
-  #[arg(short = 's')]
-  step: Option<u32>,
-
-  /// Radius of the circle, smaller means more detailed but
-  /// slower to compute (8.0 by default, must be between
-  /// 1.0 and 50.0 inclusive)
-  #[arg(short = 'r')]
-  radius: Option<f32>,
-
-  /// Loop the GIF
-  #[arg(short = 'l', long = "loop")]
-  looping: bool,
+#[derive(Debug, Clone)]
+pub enum Error {
+  CantGuessFormat,
+  DecodeError,
 }
 
-fn open_image<P: AsRef<Path>>(path: P) -> ImageBuffer<Rgb<u8>, Vec<u8>> {
-  let image = match image::io::Reader::open(path) {
-    Ok(i) => i,
-    Err(e) => {
-      eprintln!("Error opening file for processing: ");
-      eprintln!("{}", e);
-      std::process::exit(1);
-    },
+pub async fn make_quickdraw() -> Option<Arc<Mutex<QuickDraw>>> {
+  Some(Arc::new(Mutex::new(QuickDraw::new(512, 512, 1000).await?)))
+}
+
+pub async fn make_gif(
+  input: &[u8],
+  draw: Arc<Mutex<QuickDraw>>,
+) -> Result<Vec<u8>, Error> {
+  const STEP: usize = 20;
+  const RADIUS: f32 = 7.0;
+  let image = image::io::Reader::new(Cursor::new(input.to_vec().as_slice()))
+    .with_guessed_format()
+    .map_err(|_| Error::CantGuessFormat)?
+    .decode()
+    .map_err(|_| Error::DecodeError)?
+    .to_rgb8();
+  let (sim, it, max) = preprocess(image, RADIUS).await;
+  let frames = simulate(draw, sim, it, STEP, max).await;
+  let gif = encode(frames, true).await;
+  Ok(gif)
+}
+
+use rust_cgi as cgi;
+
+const CONTENT_TYPE: &'static str = "Content-Type: image/gif";
+
+rust_cgi::cgi_main!(|req: cgi::http::Request<Vec<u8>>| -> rust_cgi::Response {
+  let qd = match futures::executor::block_on(make_quickdraw()) {
+    Some(qd) => qd,
+    None => return cgi::text_response(500, "Failed to initialize WGPU"),
   };
-
-  let decoded = match image.decode() {
-    Ok(d) => d,
-    Err(e) => {
-      eprintln!("Error processing file: ");
-      eprintln!("{}", e);
-      std::process::exit(1);
-    },
+  let image = req.into_body();
+  let gif = match futures::executor::block_on(make_gif(&image, qd)) {
+    Ok(gif) => gif,
+    Err(_) => return cgi::text_response(500, "Failed to process image"),
   };
-  decoded.to_rgb8()
-}
-
-fn main() {
-  let args = Args::parse();
-
-  let output = args.output.unwrap_or("output.gif".into());
-  let step = args.step.unwrap_or(20) as usize;
-  if step == 0 {
-    eprintln!("Physics step cannot be 0");
-    std::process::exit(1);
-  }
-  let radius = args.radius.unwrap_or(8.0);
-  if radius < 1.0 || radius > 50.0 {
-    eprintln!("Invalid radius {}", radius);
-    eprintln!("Must be between 1.0 and 50.0 inclusive");
-    std::process::exit(1);
-  }
-
-  let image = open_image(args.input);
-  let (sim, it, max) = pollster::block_on(preprocess(image, radius));
-  let mut draw = pollster::block_on(QuickDraw::new(512, 512, 1000));
-  let frames = pollster::block_on(simulate(&mut draw, sim, it, step, max));
-  let gif = pollster::block_on(encode(frames, args.looping));
-  let mut file = match std::fs::File::create(output.clone()) {
-    Ok(f) => f,
-    Err(e) => {
-      eprintln!("Error opening file for writing:");
-      eprintln!("{}", e);
-      std::process::exit(1);
-    },
-  };
-
-  match file.write(&gif) {
-    Ok(_) => {
-      println!("Successfully created file at '{}'", output.display());
-    },
-    Err(e) => {
-      eprintln!("Error writing output file: ");
-      eprintln!("{}", e);
-      std::process::exit(1);
-    },
-  };
-}
+  rust_cgi::binary_response(200, CONTENT_TYPE, gif)
+});

src/sim.rs

@@ -1,6 +1,6 @@
 use std::hash::{Hash, Hasher};
 
-use crate::{helper::*, make_progress};
+use crate::helper::*;
 use image::{ImageBuffer, Rgb};
 
 pub struct Circle {
@@ -55,10 +55,7 @@ impl Simulation {
   }
 
   #[inline]
-  async fn assign_colors_from_image(
-    &mut self,
-    img: ImageBuffer<Rgb<u8>, Vec<u8>>,
-  ) {
+  fn assign_colors_from_image(&mut self, img: ImageBuffer<Rgb<u8>, Vec<u8>>) {
     let (width, height) = (img.width() as f32 - 1.0, img.height() as f32 - 1.0);
     for (pos, index) in self.circles.iter().map(|c| (c.position, c.index)) {
       let img_x =
@@ -73,7 +70,7 @@ impl Simulation {
   }
 
   #[inline]
-  pub async fn simulate_image(
+  pub fn simulate_image(
     width: f32,
     height: f32,
     circle_radius: f32,
@@ -85,22 +82,22 @@ impl Simulation {
       s.finish()
     } % 1204) as usize;
     let mut sim = Simulation::new(width, height, circle_radius, image_hash);
-    let progress = make_progress(
-      "Preprocessing",
-      (sim.max_circles + Self::POST_PROCESS) as u64,
-    );
+    // let progress = make_progress(
+    //   "Preprocessing",
+    //   (sim.max_circles + Self::POST_PROCESS) as u64,
+    // );
     while sim.circles() < sim.max_circles {
-      sim.step().await;
-      progress.inc(2);
+      sim.step();
+      // progress.inc(2);
     }
     for _ in 0..Self::POST_PROCESS {
-      sim.step().await;
-      progress.inc(1);
+      sim.step();
+      // progress.inc(1);
     }
-    progress.finish();
+    // progress.finish();
     let total_iterations = sim.clock;
     let max_circles = sim.circles.len();
-    sim.assign_colors_from_image(img).await;
+    sim.assign_colors_from_image(img);
     sim.circles.clear();
     sim.clock = sim.rand_seed;
     (sim, total_iterations, max_circles)
@@ -144,7 +141,7 @@ impl Simulation {
 
   // Insertion sort
   #[inline]
-  async fn sort(&mut self) {
+  fn sort(&mut self) {
     if self.circles.len() == 1 {
       return;
     }
@@ -159,7 +156,7 @@ impl Simulation {
   }
 
   #[inline]
-  async fn integrate(&mut self) {
+  fn integrate(&mut self) {
     let delta = self.timescale * (1.0 / self.substeps as f32);
     let gravity = Vector2::new(0.0, self.gravity) * delta.powi(2);
     self.circles.iter_mut().for_each(|circle| {
@@ -170,7 +167,7 @@ impl Simulation {
   }
 
   #[inline]
-  async fn collide(&mut self) {
+  fn collide(&mut self) {
     for i in 0..self.circles.len() {
       // Apply gravity
       for j in i..self.circles.len() {
@@ -218,7 +215,7 @@ impl Simulation {
   }
 
   #[inline]
-  pub async fn step(&mut self) {
+  pub fn step(&mut self) {
     if self.circles.len() < self.max_circles {
       self.launch();
     }
@@ -228,21 +225,19 @@ impl Simulation {
 
     for _ in 0..self.substeps {
       self.constrain_rect();
-      self.sort().await;
-      self.collide().await;
-      self.integrate().await;
+      self.sort();
+      self.collide();
+      self.integrate();
       self.clock += 1;
     }
   }
 
   #[inline]
-  pub async fn steps(&mut self, steps: usize) {
+  pub fn steps(&mut self, steps: usize) {
     for _ in 0..steps {
-      self.step().await;
+      self.step();
     }
   }
 
-  pub fn circles(&self) -> usize {
-    self.circles.len()
-  }
+  pub fn circles(&self) -> usize { self.circles.len() }
 }

src/tests.rs

@@ -1,19 +0,0 @@
-#[cfg(test)]
-#[test]
-fn bench_async() {
-  use std::io::Write;
-  flexi_logger::Logger::try_with_str("debug").unwrap();
-
-  let image = image::io::Reader::open(
-    "resources/mona
-  lisa.png",
-  )
-  .unwrap()
-  .decode()
-  .unwrap()
-  .to_rgb8();
-  // let gif = pollster::block_on(crate::generate_async(image, None));
-  // let mut file =
-  // std::fs::File::create("test.gif").unwrap();
-  // file.write(&gif).unwrap();
-}